Published May 21, 2014
| Published
Journal Article
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Molybdenum sound velocity and shear modulus softening under shock compression
Abstract
We measured the longitudinal sound velocity in Mo shock compressed up to 4.4 Mbars on the Hugoniot. Its sound speed increases linearly with pressure up to 2.6 Mbars; the slope then decreases up to the melting pressure of ∼3.8 Mbars. This suggests a decrease of shear modulus before the melt. A linear extrapolation of our data to 1 bar agrees with the ambient sound speed. The results suggest that Mo remains in the bcc phase on the Hugoniot up to the melting pressure. There is no statistically significant evidence for a previously reported bcc→hcp phase transition on the Hugoniot.
Additional Information
© 2014 American Physical Society. Received 30 August 2013; revised manuscript received 1 May 2014; published 21 May 2014. We thank R. Hixson and M. Ross for their useful discussions, and Papo Gelle, Mike Long, Russ Oliver, Bob Nafzinger, Paul Benevento, Sam Weaver, and Cory McLean for their dedicated effort. Lawrence Livermore National Laboratory is operated by Lawrence Livermore National Security, LLC, for the U.S. Department of Energy, National Nuclear Security Administration under Contract DE-AC52-07NA27344.Attached Files
Published - PhysRevB.89.174109.pdf
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Additional details
- Eprint ID
- 46236
- Resolver ID
- CaltechAUTHORS:20140612-102504287
- DE-AC52-07NA27344
- Department of Energy (DOE) National Nuclear Security Administration
- Created
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2014-06-12Created from EPrint's datestamp field
- Updated
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2023-03-16Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences